Test

Allow promoted readonly properties to be reassigned once in constructor #34

Job	Run time
Generate Matrix	9s
Suite / LINUX_X64_RELEASE_NTS	21m 26s
Suite / ALPINE_X64_ASAN_DEBUG_ZTS	21m 11s
Suite / MACOS_ARM64_DEBUG_NTS	21m 32s
Suite / WINDOWS_X64_ZTS	21m 20s
Suite / LINUX_X64_ASAN_DEBUG_ZTS	21m 26s
Suite / BENCHMARKING	16m 14s
Suite / LINUX_X32_DEBUG_ZTS	12m 22s
Suite / FREEBSD_NTS	12m 25s
Suite / PECL	0s
Suite / LINUX_PPC64_ASAN_DEBUG_ZTS	0s
Suite / COVERAGE	0s
Suite / OPCACHE_VARIATION	0s
Suite / LIBMYSQLCLIENT	0s
Suite / MSAN	0s
Suite / COMMUNITY_${{ matrix.type }}	0s
	2h 28m 5s

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